From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail1.protonmail.ch (mail1.protonmail.ch [185.70.40.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id C74A63B29E for ; Sat, 16 Jan 2021 13:15:06 -0500 (EST) Date: Sat, 16 Jan 2021 18:14:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail; t=1610820904; bh=r8ESmf06irTtVOHiWLlYz2MDMf4QtvqNE0O8Yt5e5L8=; h=Date:To:From:Cc:Reply-To:Subject:In-Reply-To:References:From; b=HFJb7A0fGZe5EBiPcN2Y7FQYS6LEQw1bgSWxIyNUFl9oNXJcvUI5giRwpSGWzy0Qd a6mbBD9w0ir09zTn3IVIp95FAFaCKEbs3san3BYBJscibisSxQoaW0hWeN0qawBmDz mafuMxxUVkeUzafMahrorLbYi6di0QBPq5cwU1ZE= To: Dave Taht From: Michael Yartys Cc: Bob McMahon , Make-Wifi-fast Reply-To: Michael Yartys Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-1.2 required=10.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM shortcircuit=no autolearn=disabled version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on mailout.protonmail.ch Subject: Re: [Make-wifi-fast] Weird periodic latency X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 16 Jan 2021 18:15:06 -0000 On Saturday, January 16th, 2021 at 19:06, Dave Taht w= rote: > thxz for the clarification. No worries! =3D) > > Also, I would really like the codel target reduced to 10ms on the > > upcoming release of openwrt. I ran the 10ms target for a while but don't really remember whether I notic= ed that much of a difference. Maybe I should try it again? =3D) Right now I'm planning to try out Toke's virtual time-based scheduler: http= s://github.com/tohojo/openwrt/blob/virtual-airtime/package/kernel/mac80211/= patches/subsys/346-mac80211-Switch-to-a-virtual-time-based-airtime-sche.pat= ch > > On Sat, Jan 16, 2021 at 10:01 AM Michael Yartys > > michael.yartys@protonmail.com wrote: > > > On Saturday, January 16th, 2021 at 18:48, Dave Taht dave.taht@gmail.com= wrote: > > > > > That implies it is doing a channel scan. Dumb. > > > > > > https://blog.cerowrt.org/post/disabling_channel_scans/ > > > > > > but what you encountered seemed more disabling than that, and the > > > > > > ath10k is supposed to be able to do background channel scans. > > > > The tests where I experienced the roller-coaster high latency were the = result of a fluke I believe. It went away after a reboot and I wasn't readi= ly able to reproduce it. Also, I believe there's some confusion here since = my laptop, which was doing the background scans, has an Intel 7260AC card. = ath10k is not at fault here (might have been during the fluke, but who know= s). > > > > > On Sat, Jan 16, 2021 at 6:47 AM Michael Yartys > > > > > > michael.yartys@protonmail.com wrote: > > > > > > > I'm pretty sure I've managed to figure out what causes the short sh= arp periodic latency spikes. The Gnome location service uses the surroundin= g wireless networks as one of the methods to determine your location. When = it's turned on I get the following results: > > > > > > > > https://imgur.com/a/pNXuVRe > > > > > > > > When it's disabled the latency spikes are gone (and notice that AQL= is working here as there is some background traffic from other clients): > > > > > > > > https://imgur.com/a/v4wWkAC > > > > > > > > Now, I wasn't able to reproduce the weird roller coaster like laten= cy that I saw previously. I rebooted the laptop before I did these tests, s= o I guess that solved it. > > > > > > > > Michael > > > > > > -- > > > > > > "For a successful technology, reality must take precedence over publi= c > > > > > > relations, for Mother Nature cannot be fooled" - Richard Feynman > > > > > > dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729 > > -- > > "For a successful technology, reality must take precedence over public > > relations, for Mother Nature cannot be fooled" - Richard Feynman > > dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729